has this historic agreement to defend israel and stand by israel. what it hopes to be able to do is encourage israel not to cause too many civilian casualties, like what happened last time. but beyond that, the united states is not going to get involved on the ground. >> where do you place the odds that hamas will listen to the egyptians and, indeed, there will be a cease-fire? >> reporter: i think it's going to take some time. but this, the israelis say, is going to go on. it's not a matter of days, it could be weeks, diane. >> christiane amanpour reporting from jerusalem tonight. thank you so much. >>> and now, back here in the united states, we have news about the scandal that toppled the cia director, former general david petraeus. abc's brian ross look eed into this question. did the two women involved in the scandal try to make a profit off their ties to the officers? here's the brian ross investigation. >> reporter: in addition to the book and the sex, paula broadwell's relationship with general david petraeus provided another benefit. a cele